The Compass,magnetic,mounted, cataloged under National Stock Number 6605-01-119-3971, is classified within Federal Supply Class 6605 (Navigational Instruments) of the Instruments and Laboratory Equipment group. The manufacturer of record is Ritchie E S and Sons Inc. Government technical data includes 14 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6605-01-119-3971 |
| Primary Part Number | DR-5B |
| Item Name | Compass,magnetic,mounted |
| FSC / FSG | 6605 / 66 — Navigational Instruments |
| Manufacturer | Ritchie E S and Sons Inc |
| Status | ACTIVE |
| Design Type | TOP READING |
| Overall Diameter | 7.125 INCHES NOMINAL IN |
| Mounting Method | BINNACLE |
| Illuminated Feature | INCLUDED |
| Compensator Type | CYLINDERS |
| Compensating Feature | INCLUDED |
| Card Size | 5.000 INCHES IN |
| Fluid Type | ANY ACCEPTABLE |
| Bowl Shape | SPHERICAL |
| Heeling Correctors | NOT PROVIDED |
| Instrument Type | WET |
| Bowl Element Type | CARD |
| Dial Size | 5.000 INCHES IN |
| Smallest Increment in Deg | 5.0 CARD |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| DR-5B PRIMARY | Ritchie E S and Sons Inc (USA) |
| Reference | Meaning |
|---|---|
| DR-5 | 5/9 Secondary reference Ritchie E S and Sons Inc |
NSN 6605-01-119-3971 is a Compass,magnetic,mounted, manufactured by Ritchie E S and Sons Inc, classified under FSC 6605, Navigational Instruments. Status: active.
NSN 6605-01-119-3971 has 1 manufacturer part number on file: DR-5B (Ritchie E S and Sons Inc).
1 possible match (shared part number, not a government interchangeability claim): 6750-01-369-7445. Verify interchangeability with system specifications before substitution.
Key specifications for DR-5B: Overall Height: 7.750 INCHES NOMINAL IN; Design Type: TOP READING; Overall Diameter: 7.125 INCHES NOMINAL IN; Mounting Method: BINNACLE. 14 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.